Oranssi Pazuzu, the gods of psych black prog metal!! Many an act attempts to fuse those elements, and very few do it well. OP are and will continue to be the leaders in this style! Ralph Douglas
Sounds like Cthulhu going on a Benadryl and bath-salts fueled rampage through a Guitar Center while a bunch of the fish people from Innsmouth gang bang in the background.
The guys from Ulthar sound more focused this time around, compared to the more meandering bits of Helionomicon (which is also awesome, check it out). And the album art... holy hell. Ghuughra